Red Sox designated hitter David Ortiz does not have a tear or rupture in his Achilles’ tendon and will take some time off, but will not be placed on the disabled list.

Wearing a walking boot around the clubhouse after getting a treatment on his injured Achilles’ tendon Monday night and undergoing an MRI Tuesday, Ortiz guessed that he’d be out for about a week. The plan is to get a second opinion in Miami Wednesday and decide whether he will need to go on the disabled list.

Earlier Tuesday, Red Sox management discussed the possibility of a trip to the disabled list for Ortiz. But the Red Sox waited until Ortiz arrived at Fenway Park to go over the options.

Daniel Nava replaced Ortiz in the lineup on Tuesday.

”The MRI has shown that there’s not a tear, he’s sore, and he’s going to get another opinion,’’ confirmed Sox manager Bobby Valentine.

Asked if the team was considering placing Ortiz on the disabled list, Valentine said, “Talking with some of the medical staff, they thought a 24-hour wait at least was something that gives you a different opinion sometimes. So we’ll wait at least 24 hours, or at least until tomorrow, maybe until we get a second opinion.’’